851442515 has 24 divisors (see below), whose sum is σ = 1283503200. Its totient is φ = 530766720.

The previous prime is 851442481. The next prime is 851442517. The reversal of 851442515 is 515244158.

It is a de Polignac number, because none of the positive numbers 2^k-851442515 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851442517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96290 + ... + 104759.

It is an arithmetic number, because the mean of its divisors is an integer number (53479300).

Almost surely, 2^851442515 is an apocalyptic number.

851442515 is a deficient number, since it is larger than the sum of its proper divisors (432060685).

851442515 is a wasteful number, since it uses less digits than its factorization.

851442515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201083 (or 201072 counting only the distinct ones).

The product of its digits is 32000, while the sum is 35.

The square root of 851442515 is about 29179.4879153148. The cubic root of 851442515 is about 947.8037965506.

The spelling of 851442515 in words is "eight hundred fifty-one million, four hundred forty-two thousand, five hundred fifteen".